mikas blog

Die Funktionstasten (F1, F2,…) von Apple-Tastaturen erfordern je nach Modell das Drücken der Funktionstaste (fn), um unter Linux wie gewohnt zu funktionieren – wie es der Aufdruck auf der Tastatur auch schon andeutet. Dafür gibt es einen Workaround, Powerbook-Usern wird vielleicht das Stichwort pb_fnmode (/sys/module/hid/parameters/pb_fnmode) was sagen. Das war auf dem USB-Tastatur-Modell MB110D/A und Linux-Kernel […]

The advent calendar started with a Zsh tip, let’s end the advent calendar session with a Zsh tip: globbing. Globbing is like pattern matching. When running ‘ls *.txt’ you’re using globbing. But the globbing feature inside Zsh is much more powerful. Quoting the H-Glob function (“help globbing”) of grml’s Zsh configuration: % H-Glob / directories […]

Nagios is a well known and established Open Source Monitoring System. It’s flexible, easy to deploy and a tool every sysadmin should know how to deal with. I guess most readers of my blog use or at least know Nagios so I’ll keep this blog entry short. But one tip for sysadmins managing Debian systems: […]

The console mail client mutt has some nice features and I noticed that even some long time users of mutt don’t use some of the most rocking features. What’s definitely worth knowing: patterns. Want to display only mails sent from foo@example.org? Select the limit command to show only messages matching a pattern (bound to ‘l’ […]

I wrote about FAI for deploying systems a few days ago – but FAI might be too much overhead if you want to install just some few Debian systems and prefer to use a configuration system like puppet instead. Then using grml-debootstrap might be an option for you. As you might know grml is a […]

I blogged about some tips for optimizing the workflow on the command line in my advent calendar already (like irssi backlog completion, Zsh keybindings and hashes in the zsh). When optimizing your workflow you should be aware of what exactly is eating up your time. Start with evaluating your top 10 shell commands, in Zsh […]

One of the reasons why Zsh rocks so much is its completion system. Tab, tab, tab…. Using default Zsh without an useful configuration? Then start with loading the completion system: autoload -U compinit && compinit Now check out the completion system with tools that provide lots of options, like for example gpg and rsync. Then […]

grml-live is a buildsystem for generating a grml and Debian based Linux live system (CD/ISO). It’s based on FAI (I mentioned FAI a few days ago already) because its class concept provides a flexible infrastructure for building custom systems. grml-live uses squashfs-tools for building a compressed file (so you can get >2GB on a 700MB […]

ldapvi is an interactive LDAP client for Unix terminals. Using it, you can update LDAP entries with a text editor. Start exploring it running: ldapvi –discover –host $SERVER If you have to deal with LDAP on the command line and want to use $EDITOR for editing: ldapvi is for you. :)

Configuration management tools provide the ability to abstract your requirements. For example you might be running your own (procedural) scripts – which could be even platform specific (igitt) – to add new users. Instead when using a configuration management tool you instruct the system in a (declarative) specification language to do so. This provides much […]

Frank Terbeck, a grml developer, implemented vcs_info for the Zsh. vcs_info is a nice and flexible system for providing version control information information within the Zsh prompt. It provides support for bzr, cdv, cvs, darcs, git, hg, mtn, p4, svk, svn and tla. vcs_info is available since zsh-beta, version 4.3.6-dev-0+20080929-1 or later and using the […]

Seriously, if you don’t know GNU screen yet: where are you living? 8-) Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. If you want to leave (not exit) your current shell session(s) and re-attach them later again: GNU screen is the answer. If you don’t use […]

Displaying more with less: lesspipe.sh is an input filter for the pager less as described in its man page. The script runs under a ksh compliant shell (ksh, bash, zsh) and allows to view files with binary content, compressed files, archives and files contained in archives. A large and growing number of formats are supported […]

Clifford Wolf war ja im September mit 2 Vorträgen zu Besuch in Graz. Jetzt gibt es die Videos dazu online: Vom (MOSFET) Transistor zum (CMOS) Gatter Sourcecode Management mit GIT Die Credits gehen an Wolfgang Dautermann.

IPython is an enhanced interactive Python shell. It provides some nifty features the usual python console doesn’t provide. Check out the Quick IPython tutorial, the IPython cookbook, IPython as a system shell and the IPython reference for more information.

The “Bluetooth Applet 1.8” preferences dialog of the Gnome desktop on Ubuntu is broken: The plus and the trash symbol seem reasonable. But the “connector” and the info button just don’t provide any deterministic behaviour. Thanks for not providing any tooltips so the user might get an idea what the buttons could do for him. […]

The current release of grml does NOT ship Truecrypt. But why? Truecrypt claims to be a “Free open-source disk encryption software for Windows Vista/XP, Mac OS X, and Linux”. The reason is simple: because the TrueCrypt License Version 2.6 is not a real open source license and does not permit distribution. Quoting section VI./4: 4. […]

Wie schon einmal gebloggt habe ich mir ja vor Kurzem das LG X110 Netbook gekauft. Was ich bisher feststellen kann: die FUTJISTU-Festplatte ist mir bei intensiver Beanspruchung eine Spur zu laut (es wird Zeit für interessantere Preise bei den SSDs :)) die Lüfterlautstärke ist OK (ich bin da ziemlich sensibel) die Akkulaufzeit ist mit ~2:00-2:30h […]

FAI is an automated installation tool to install or deploy Debian GNU/Linux and other distributions on a bunch of different hosts or a Cluster. It’s more flexible than other tools like kickstart for Red Hat, autoyast and alice for SuSE or Jumpstart for SUN Solaris. FAI can also be used for configuration management of a […]

Wenn Anwender neue Möglichkeiten von sich aus entdecken: Kurztipp: grml-small 2008.11 via PXE booten ohne NFS, von Markus Wigge auf pro-linux.de Danke Markus, YMMD.